Tuning-coil mounting



April 20', 1926. 1,581,162

E. J. BOUCHER TUNING c0111 MOUNTING Filed April 18, 1923 2 Sh eetsShe'et1 Jrwentoz airman A ril 20, 1926. 1,581,162

E. J. BOUCHER TUNING COIL MOUNTING Filed April 18, 1923 2 Sheets-Sheet 2Patented Apr. 2E9, 192%.

cairn stares ELIILE J. BOUCHEBI, F CATONSVILLE, MARYLAND.

TUIIING-COIL MOUNTING.

Application filed Apri1 18, 1923. Serial No. 632,880.

To all 10720212.. it may concern:

it known that I, Ennis J. Bouonnn, a citizen of the United States,residing at Catonsville, in the county of Baltimore and State ofh'laryland, have invented certain new and useful Improvements in Tuning-Coil Mountings; and I do h reby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to coil mountings.

Among the objects of my invention are To produce a coil mounting capableof controlling the mutual inductance between the primary coil and thesecondary and tickler coils of a tuning set by moving the secondary andtickler coils relatively to said primary coil, which is fixed.

To produce such a mounting which obviates the necessity for gears bymounting the secondary and ticlrler coils upon revoluble shafts whichextend to the front of a panel forming part of the tuning set andcombining with said shaft an efficient de vice for producing sufficientfriction to hold said coils in whatever positions they may be placed.

Heretofore, ditliculty has arisen by the use of inefficient frictionaldevices, or secondary and tickler coils have been mounted on verticalshafts, but this form of mounting required the use of gears when theoperating knobs for said coils were placed on the front of the panel.

My invention also comprehends certain peculiarities in the attachment ofthe secondary and tickler coils to the plug comprising the terminals ofsaid coils.

By the use of my improved mounting I am enabled to readily remove thecoil from a plug to secure another coil to said plug. These and furtherobjects of my invention will be set forth in the followingspecification, reference being had to the accompanying drawings, and themeans by which said objects are efiectuated will be definitely pointedout in the claim.

In the drawings Figure 1 is a side view of a tuning set equipped with myimproved device.

Fig. 2 is a section along the line 2-2 in Fig. 1 looking in thedirection of the arrows, the base being omitted.

Fig. 3 is a section along the line 3-3 in 5 Fig. 1 looking in thedirection of the arrows. Fig. 1 is a detail hereinafter referredto. Inthe drawings 5 represents the base to which there is secured a verticalpanel 6, both being made of any approved material.

To the'base 5 housings 7'? are securedand said housings comprise bearingholes for the shafts 8 and 9. The panel 6 also comprises bearing holesfor said shafts and 6. on the front of each of said shafts there issecured an operating knob similar to 10 which is secured to the shaft 8.To each of said knobs is secured a pointer 11 which cooperates with anyusual form of dial, (not shown), for indicating the angular positions ofsaid shafts.

A metallic plate similar to 12 having a hole through which passes thecorresponding shaft is placed upon each of the shafts 8 and 9 and saidplate is prevented from turning by friction against the panel 6.

A hub such as 18 is secured upon each of the shafts 8 and 9 by a screwsuch as 14: and to each of the hubs 18 there is secured a plurality ofspring fingers such as 15 which bear against the plate 12 withsufficient force to hold the shafts 8 and 9 in any position to whichthey may be moved.

Between the housings 7-7 there is secured to the shaft 8 a plug 16 and asimilar plug 17 is secured upon the shaft 9 between said housings. Eachof these plugs has two screws such as 18 for the attachment ofconductors thereto, and in addition, each plug has a projecting terminal19 and a tubular terminal 20 mounted therein, the latter not extendingbeyond the surface of said plug.

A plug 21 similar to the plugs 16 and 17 is secured between the housing7-7 midway between the shafts 8 and 9.

A stop 22 is secured in the plu 2 1 for a purpose hereinafter explained.

Plugs 23, 24: and 25, similar to the plugs 16, 21 and 17 are detachablysecured, respectively, to the last-named plugs by the projectingterminals 26 in the plugs 23, 24c and entering the terminals 20 on theplugs 16, 21 and 17, and by the tubes 27 in the plugs 23, 24; and 25embracing the project ing terminals 19 upon the plugs 16, 21 and 1(.

secured. to the plugs ea and and since the mode of securing the twoplugs is similar, it will be described only with reference to the plug23.

The support QS-is secured to the plug H3 by screws such as 29 and saidsupport is bent at right angles and to the bent end there is secured, asy soldering or in any approved manner, the threadedsleeve 30, having theflange 31 formed integrally therewith.

The coil disk is provided rith a hole through Which passes the sleeve30. A Washer 33 is mounted on said sleeve and the nut 84 clamps the coildisk 32'between the flange 31 and washer33.

The coil 35 is stagger-wound in the usual mannerand its terminalsconnected to the screws 36. A similar coil 37 is mounted uponthe coildisk 38 and its terminals are connected to the screws A coil disk 40 isprovided with a coil ll connected-to the screws and said dis: isPIOVlClGlTl with an extension 4.3

which is mountedin the slot provided in the plug 24 and secured thereinby the screw ll.

.The operation ofniy improved coil mountingis as follows:

It the support 28 is removed from the plug 23 and the nut 3% is removedfrom the sleeve 30, then the coil dish (see Fig;2) ,-maybe movedatowardsthe left past the 'bend in the support which can then be Withdrawn fromsaid coil.

By this means I provide for attaching a plurality of coils differing innumber of turns of wire to the plug 23. Similarly, coils difiering innumber of turns of wire may be attached tothe plug 25.

The coils 35 and 3'? areusuallywoi Lid with a different number of turns,and it is evident that the plugs E23 and 25 with their attached coilsmay be reversed in position.

Itis also evident that when the plugs 16 and 1'? strike the ends of thestop 22, their movement toward the central plug 21 will be arrested.

The positions of the coils 35 and 53? with reference to the coil llcanbe varied by turning the knobs lO -and the spring lingers will holdsaid coils in whatever positions they maybe placer "While 1 have shownone preferred form ot'iny invention, it is to he understood that this isfor purposes of illustration only and in nowise to limit the scopethereof, for changes may be made therein w thout dcparting from thespirit Ofll'lf," iDTGfitlOil. 1 claim l he con'ibination with a plugcomprising terminals, of a support secured to said plug,

a threaded-sleeveprovided with a flange sccured onsaid support, a coildiskino-unted on said sleeve, a nut on said sleeve for clamping saiddisk against said flange, and a 0011 on said disk having its endsconnected to said terminals.

In testimony whereof, I allix my signature.

EMILE J. BGUCHER.

CIY

